docs: def _build_payload(self, key, value, metric_type):
          """Return the """
          if self._setting('include_hostname', True):
              return self.PAYLOAD_HOSTNAME.format(
                  self._prefix, self._hostname, self._consumer_name, key, value,
                  metric_type)
          return self.PAYLOAD_NO_HOSTNAME.format(
              self._prefix, self._consumer_name, key, value,
              metric_type)